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Gigahertz free-space electro-optic modulators based on Mie resonances by Benea-Chelmus, Ileana-Cristina; Mason, Sydney; Meretska, Maryna L.; Elder, Delwin L.; Kazakov, Dmitry; Shams-Ansari, Amirhassan; Dalton, Larry R.; Capasso, Federico is a scholarly article available to read on EtoBox.

What is Gigahertz free-space electro-optic modulators based on Mie resonances about?

Electro-optic modulators from non-linear $\chi^{(2)}$ materials are essential for sensing, metrology and telecommunications because they link the optical domain with the microwave domain. At present, most geometries are suited for fiber applications. In contrast, architectures that modulate directly free-space light at gigahertz (GHz) speeds have remained very challenging, despite their dire need for active free-space optics, in diffractive computing or for optoelectronic feedback to free-space emitters. They are typically bulky or suffer from much reduced interaction lengths. Here, we employ an ultrathin array of sub-wavelength Mie resonators that support quasi bound states in the continuum (BIC) as a key mechanism to demonstrate electro-optic modulation of free-space light with high efficiency at GHz speeds. Our geometry relies on hybrid silicon-organic nanostructures that feature low loss ($Q = $ 550 at $\lambda_{res} = 1594$ nm) while being integrated with GHz-compatible coplanar waveguides. We maximize the electro-optic effect by using high-performance electro-optic molecules (whose electro-optic tensor we engineer in-device to exploit $r_{33} = 100$ pm/V) and by nanoscale opt

Author

Benea-Chelmus, Ileana-Cristina; Mason, Sydney; Meretska, Maryna L.; Elder, Delwin L.; Kazakov, Dmitry; Shams-Ansari, Amirhassan; Dalton, Larry R.; Capasso, Federico

Published

2021

Language

EN